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errors.go
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errors.go
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// Copyright 2016 CodisLabs. All Rights Reserved.
// Licensed under the MIT (MIT-LICENSE.txt) license.
package errors
import (
"errors"
"fmt"
"github.com/ducesoft/codis/pkg/utils/trace"
)
var TraceEnabled = true
type TracedError struct {
Stack trace.Stack
Cause error
}
func (e *TracedError) Error() string {
return e.Cause.Error()
}
func New(s string) error {
return errors.New(s)
}
func Trace(err error) error {
if err == nil || !TraceEnabled {
return err
}
_, ok := err.(*TracedError)
if ok {
return err
}
return &TracedError{
Stack: trace.TraceN(1, 32),
Cause: err,
}
}
func Errorf(format string, v ...interface{}) error {
err := fmt.Errorf(format, v...)
if !TraceEnabled {
return err
}
return &TracedError{
Stack: trace.TraceN(1, 32),
Cause: err,
}
}
func Stack(err error) trace.Stack {
if err == nil {
return nil
}
e, ok := err.(*TracedError)
if ok {
return e.Stack
}
return nil
}
func Cause(err error) error {
for err != nil {
e, ok := err.(*TracedError)
if ok {
err = e.Cause
} else {
return err
}
}
return nil
}
func Equal(err1, err2 error) bool {
e1 := Cause(err1)
e2 := Cause(err2)
if e1 == e2 {
return true
}
if e1 == nil || e2 == nil {
return e1 == e2
}
return e1.Error() == e2.Error()
}
func NotEqual(err1, err2 error) bool {
return !Equal(err1, err2)
}